Is it a bad practice to have the Platformer Sprite Animation and Movement Behaviours together? Will it somehow cause glitches ? I already made it and it was put together and I was wondering if do I really need to redo them all and separate the movement and animations for them to work well?

Since you already done the work just make sure the origins are in the same place in all animation frames and that the collision boxes are all the same size. However, I recommend that yyou seperate this in the future. In my opinoon it just makes more sense and it ends up easier to work with in the future.